Van Hove singularities (vHSs) strongly amplify electron interactions and can stabilize correlated phases in topological bands. Here we report signatures of topological magnetism in large-angle twisted bilayer MoTe2 driven by the interplay of vHSs, strong correlations, and valley topology. In a 4.8 degree device, electrostatic tuning to a vHS produces a spontaneous anomalous Hall hot spot near nu = -1. Combined transport and reflective magnetic circular dichroism measurements indicate that this regime is not governed by magnetization alone, but instead emerges from a correlated intervalley-coherent antiferromagnetic state that evolves with doping into a canted phase. With increasing magnetic field, the Hall response develops an additional finite-field component consistent with a topological Hall effect from a noncoplanar spin texture, before transitioning into a C = -1 Chern insulator. Our results establish tunable vHSs in moire topological bands as a route to chiral magnetism and engineering topological phase transitions.
@article{arxiv.2604.23587,
title = {Van Hove Singularity-Driven Topological Magnetism in Twisted MoTe2},
author = {Heonjoon Park and Julian Stewart and Xiao-Wei Zhang and Taige Wang and Canxun Zhang and Evgeny Redekop and Jiaqi Cai and Weijie Li and Eric Anderson and Takashi Taniguchi and Kenji Watanabe and Jiun-Haw Chu and David Cobden and Andrea Young and Liang Fu and Ting Cao and Di Xiao and Xiaodong Xu},
journal= {arXiv preprint arXiv:2604.23587},
year = {2026}
}